./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/chl-array-int-trans.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version d790fecc Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bbc2480-f651-4e25-abd7-0db36f997a06/bin/uautomizer-verify-aQ6SnzHsRB/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bbc2480-f651-4e25-abd7-0db36f997a06/bin/uautomizer-verify-aQ6SnzHsRB/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bbc2480-f651-4e25-abd7-0db36f997a06/bin/uautomizer-verify-aQ6SnzHsRB/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bbc2480-f651-4e25-abd7-0db36f997a06/bin/uautomizer-verify-aQ6SnzHsRB/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/chl-array-int-trans.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bbc2480-f651-4e25-abd7-0db36f997a06/bin/uautomizer-verify-aQ6SnzHsRB/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bbc2480-f651-4e25-abd7-0db36f997a06/bin/uautomizer-verify-aQ6SnzHsRB --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 5bb11505151393f96d52a572beff0352326876d897656a8082ae272a8f39e0b4 --- Real Ultimate output --- This is Ultimate 0.3.0-dev-d790fec [2024-11-28 02:41:27,425 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-28 02:41:27,534 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bbc2480-f651-4e25-abd7-0db36f997a06/bin/uautomizer-verify-aQ6SnzHsRB/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-28 02:41:27,546 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-28 02:41:27,546 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-28 02:41:27,582 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-28 02:41:27,583 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-28 02:41:27,584 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-28 02:41:27,585 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-28 02:41:27,585 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-28 02:41:27,586 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-28 02:41:27,586 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-28 02:41:27,587 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-28 02:41:27,587 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-28 02:41:27,587 INFO L153 SettingsManager]: * Use SBE=true [2024-11-28 02:41:27,588 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-28 02:41:27,588 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-28 02:41:27,589 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-28 02:41:27,589 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-28 02:41:27,589 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-28 02:41:27,589 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-28 02:41:27,589 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-28 02:41:27,589 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-28 02:41:27,589 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-28 02:41:27,589 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-28 02:41:27,590 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-28 02:41:27,590 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-28 02:41:27,590 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2024-11-28 02:41:27,590 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-28 02:41:27,590 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-28 02:41:27,590 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-28 02:41:27,590 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-28 02:41:27,591 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-28 02:41:27,592 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 02:41:27,592 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-28 02:41:27,592 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-28 02:41:27,592 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-28 02:41:27,592 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-28 02:41:27,593 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 02:41:27,593 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-28 02:41:27,593 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-28 02:41:27,593 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-28 02:41:27,593 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-28 02:41:27,593 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-28 02:41:27,593 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-28 02:41:27,594 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-28 02:41:27,594 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-28 02:41:27,594 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bbc2480-f651-4e25-abd7-0db36f997a06/bin/uautomizer-verify-aQ6SnzHsRB Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5bb11505151393f96d52a572beff0352326876d897656a8082ae272a8f39e0b4 [2024-11-28 02:41:27,933 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-28 02:41:27,947 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-28 02:41:27,949 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-28 02:41:27,951 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-28 02:41:27,952 INFO L274 PluginConnector]: CDTParser initialized [2024-11-28 02:41:27,954 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bbc2480-f651-4e25-abd7-0db36f997a06/bin/uautomizer-verify-aQ6SnzHsRB/../../sv-benchmarks/c/weaver/chl-array-int-trans.wvr.c [2024-11-28 02:41:30,909 INFO L533 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bbc2480-f651-4e25-abd7-0db36f997a06/bin/uautomizer-verify-aQ6SnzHsRB/data/98d9af624/db9fa43b6ee443e8854548b133223793/FLAG7851c6a2c [2024-11-28 02:41:31,210 INFO L384 CDTParser]: Found 1 translation units. [2024-11-28 02:41:31,216 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bbc2480-f651-4e25-abd7-0db36f997a06/sv-benchmarks/c/weaver/chl-array-int-trans.wvr.c [2024-11-28 02:41:31,244 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bbc2480-f651-4e25-abd7-0db36f997a06/bin/uautomizer-verify-aQ6SnzHsRB/data/98d9af624/db9fa43b6ee443e8854548b133223793/FLAG7851c6a2c [2024-11-28 02:41:31,289 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bbc2480-f651-4e25-abd7-0db36f997a06/bin/uautomizer-verify-aQ6SnzHsRB/data/98d9af624/db9fa43b6ee443e8854548b133223793 [2024-11-28 02:41:31,294 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-28 02:41:31,295 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-28 02:41:31,297 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-28 02:41:31,297 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-28 02:41:31,302 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-28 02:41:31,305 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 02:41:31" (1/1) ... [2024-11-28 02:41:31,306 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6e4ea52d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:41:31, skipping insertion in model container [2024-11-28 02:41:31,307 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 02:41:31" (1/1) ... [2024-11-28 02:41:31,329 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-28 02:41:31,572 WARN L1063 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-28 02:41:31,583 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-28 02:41:31,598 INFO L200 MainTranslator]: Completed pre-run [2024-11-28 02:41:31,643 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-28 02:41:31,668 INFO L204 MainTranslator]: Completed translation [2024-11-28 02:41:31,668 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:41:31 WrapperNode [2024-11-28 02:41:31,668 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-28 02:41:31,669 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-28 02:41:31,670 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-28 02:41:31,670 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-28 02:41:31,676 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:41:31" (1/1) ... [2024-11-28 02:41:31,687 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:41:31" (1/1) ... [2024-11-28 02:41:31,728 INFO L138 Inliner]: procedures = 25, calls = 35, calls flagged for inlining = 14, calls inlined = 22, statements flattened = 266 [2024-11-28 02:41:31,728 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-28 02:41:31,729 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-28 02:41:31,729 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-28 02:41:31,729 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-28 02:41:31,739 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:41:31" (1/1) ... [2024-11-28 02:41:31,739 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:41:31" (1/1) ... [2024-11-28 02:41:31,743 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:41:31" (1/1) ... [2024-11-28 02:41:31,766 INFO L175 MemorySlicer]: Split 17 memory accesses to 2 slices as follows [2, 15]. 88 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 3 writes are split as follows [0, 3]. [2024-11-28 02:41:31,767 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:41:31" (1/1) ... [2024-11-28 02:41:31,767 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:41:31" (1/1) ... [2024-11-28 02:41:31,777 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:41:31" (1/1) ... [2024-11-28 02:41:31,778 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:41:31" (1/1) ... [2024-11-28 02:41:31,783 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:41:31" (1/1) ... [2024-11-28 02:41:31,785 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:41:31" (1/1) ... [2024-11-28 02:41:31,787 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:41:31" (1/1) ... [2024-11-28 02:41:31,790 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-28 02:41:31,791 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-28 02:41:31,791 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-28 02:41:31,792 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-28 02:41:31,793 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:41:31" (1/1) ... [2024-11-28 02:41:31,799 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 02:41:31,814 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bbc2480-f651-4e25-abd7-0db36f997a06/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:41:31,828 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bbc2480-f651-4e25-abd7-0db36f997a06/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-28 02:41:31,832 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bbc2480-f651-4e25-abd7-0db36f997a06/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-28 02:41:31,858 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-28 02:41:31,859 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-28 02:41:31,859 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-28 02:41:31,859 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-28 02:41:31,859 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-28 02:41:31,859 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-11-28 02:41:31,859 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-11-28 02:41:31,859 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-28 02:41:31,859 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-28 02:41:31,859 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-28 02:41:31,859 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-28 02:41:31,860 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-28 02:41:31,860 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-28 02:41:31,860 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-28 02:41:31,860 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-28 02:41:31,861 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-28 02:41:31,864 WARN L203 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-28 02:41:32,018 INFO L234 CfgBuilder]: Building ICFG [2024-11-28 02:41:32,020 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-28 02:41:32,608 INFO L279 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-28 02:41:32,608 INFO L283 CfgBuilder]: Performing block encoding [2024-11-28 02:41:33,036 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-28 02:41:33,036 INFO L312 CfgBuilder]: Removed 6 assume(true) statements. [2024-11-28 02:41:33,037 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 02:41:33 BoogieIcfgContainer [2024-11-28 02:41:33,037 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-28 02:41:33,042 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-28 02:41:33,042 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-28 02:41:33,048 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-28 02:41:33,048 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 02:41:31" (1/3) ... [2024-11-28 02:41:33,049 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b3898c9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 02:41:33, skipping insertion in model container [2024-11-28 02:41:33,049 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:41:31" (2/3) ... [2024-11-28 02:41:33,049 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b3898c9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 02:41:33, skipping insertion in model container [2024-11-28 02:41:33,049 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 02:41:33" (3/3) ... [2024-11-28 02:41:33,050 INFO L128 eAbstractionObserver]: Analyzing ICFG chl-array-int-trans.wvr.c [2024-11-28 02:41:33,070 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-28 02:41:33,072 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG chl-array-int-trans.wvr.c that has 4 procedures, 79 locations, 1 initial locations, 6 loop locations, and 32 error locations. [2024-11-28 02:41:33,072 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-28 02:41:33,178 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-11-28 02:41:33,224 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 88 places, 87 transitions, 195 flow [2024-11-28 02:41:33,285 INFO L124 PetriNetUnfolderBase]: 9/84 cut-off events. [2024-11-28 02:41:33,290 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-11-28 02:41:33,298 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97 conditions, 84 events. 9/84 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 275 event pairs, 0 based on Foata normal form. 0/43 useless extension candidates. Maximal degree in co-relation 63. Up to 2 conditions per place. [2024-11-28 02:41:33,298 INFO L82 GeneralOperation]: Start removeDead. Operand has 88 places, 87 transitions, 195 flow [2024-11-28 02:41:33,303 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 84 places, 83 transitions, 184 flow [2024-11-28 02:41:33,318 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-28 02:41:33,333 INFO L333 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=None, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@1e517f7b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-28 02:41:33,333 INFO L334 AbstractCegarLoop]: Starting to check reachability of 59 error locations. [2024-11-28 02:41:33,339 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-28 02:41:33,339 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2024-11-28 02:41:33,339 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-28 02:41:33,339 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 02:41:33,340 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-28 02:41:33,340 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-28 02:41:33,367 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:41:33,368 INFO L85 PathProgramCache]: Analyzing trace with hash 870673, now seen corresponding path program 1 times [2024-11-28 02:41:33,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:41:33,378 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1063140127] [2024-11-28 02:41:33,378 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:41:33,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:41:33,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:41:33,687 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:41:33,688 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:41:33,688 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1063140127] [2024-11-28 02:41:33,688 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1063140127] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 02:41:33,689 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 02:41:33,690 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-28 02:41:33,692 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525811738] [2024-11-28 02:41:33,693 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 02:41:33,700 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-28 02:41:33,705 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:41:33,733 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-28 02:41:33,734 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-28 02:41:33,832 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 87 [2024-11-28 02:41:33,835 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 83 transitions, 184 flow. Second operand has 3 states, 3 states have (on average 45.0) internal successors, (135), 3 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:41:33,835 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 02:41:33,835 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 87 [2024-11-28 02:41:33,836 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 02:41:34,334 INFO L124 PetriNetUnfolderBase]: 977/1702 cut-off events. [2024-11-28 02:41:34,334 INFO L125 PetriNetUnfolderBase]: For 63/63 co-relation queries the response was YES. [2024-11-28 02:41:34,345 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3126 conditions, 1702 events. 977/1702 cut-off events. For 63/63 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 9516 event pairs, 608 based on Foata normal form. 1/1214 useless extension candidates. Maximal degree in co-relation 2866. Up to 1318 conditions per place. [2024-11-28 02:41:34,367 INFO L140 encePairwiseOnDemand]: 81/87 looper letters, 36 selfloop transitions, 2 changer transitions 0/78 dead transitions. [2024-11-28 02:41:34,367 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 78 transitions, 250 flow [2024-11-28 02:41:34,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-28 02:41:34,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-28 02:41:34,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 174 transitions. [2024-11-28 02:41:34,386 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6666666666666666 [2024-11-28 02:41:34,388 INFO L175 Difference]: Start difference. First operand has 84 places, 83 transitions, 184 flow. Second operand 3 states and 174 transitions. [2024-11-28 02:41:34,389 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 78 transitions, 250 flow [2024-11-28 02:41:34,403 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 78 transitions, 238 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-11-28 02:41:34,409 INFO L231 Difference]: Finished difference. Result has 75 places, 78 transitions, 166 flow [2024-11-28 02:41:34,412 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=162, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=166, PETRI_PLACES=75, PETRI_TRANSITIONS=78} [2024-11-28 02:41:34,418 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, -9 predicate places. [2024-11-28 02:41:34,418 INFO L471 AbstractCegarLoop]: Abstraction has has 75 places, 78 transitions, 166 flow [2024-11-28 02:41:34,418 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 45.0) internal successors, (135), 3 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:41:34,418 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 02:41:34,419 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-28 02:41:34,419 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-28 02:41:34,419 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-28 02:41:34,420 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:41:34,420 INFO L85 PathProgramCache]: Analyzing trace with hash 870674, now seen corresponding path program 1 times [2024-11-28 02:41:34,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:41:34,420 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357369389] [2024-11-28 02:41:34,420 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:41:34,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:41:34,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:41:34,869 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:41:34,869 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:41:34,869 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1357369389] [2024-11-28 02:41:34,869 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1357369389] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 02:41:34,870 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 02:41:34,870 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-28 02:41:34,870 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692057912] [2024-11-28 02:41:34,871 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 02:41:34,872 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-28 02:41:34,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:41:34,872 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-28 02:41:34,873 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-28 02:41:34,989 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 87 [2024-11-28 02:41:34,989 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 78 transitions, 166 flow. Second operand has 4 states, 4 states have (on average 44.75) internal successors, (179), 4 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:41:34,991 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 02:41:34,991 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 87 [2024-11-28 02:41:34,991 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 02:41:35,480 INFO L124 PetriNetUnfolderBase]: 978/1705 cut-off events. [2024-11-28 02:41:35,481 INFO L125 PetriNetUnfolderBase]: For 10/10 co-relation queries the response was YES. [2024-11-28 02:41:35,485 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3073 conditions, 1705 events. 978/1705 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 9546 event pairs, 608 based on Foata normal form. 0/1213 useless extension candidates. Maximal degree in co-relation 3036. Up to 1331 conditions per place. [2024-11-28 02:41:35,499 INFO L140 encePairwiseOnDemand]: 82/87 looper letters, 40 selfloop transitions, 4 changer transitions 0/81 dead transitions. [2024-11-28 02:41:35,500 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 81 transitions, 260 flow [2024-11-28 02:41:35,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-28 02:41:35,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-28 02:41:35,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 221 transitions. [2024-11-28 02:41:35,503 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6350574712643678 [2024-11-28 02:41:35,503 INFO L175 Difference]: Start difference. First operand has 75 places, 78 transitions, 166 flow. Second operand 4 states and 221 transitions. [2024-11-28 02:41:35,503 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 81 transitions, 260 flow [2024-11-28 02:41:35,504 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 81 transitions, 256 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-28 02:41:35,508 INFO L231 Difference]: Finished difference. Result has 78 places, 81 transitions, 189 flow [2024-11-28 02:41:35,509 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=162, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=189, PETRI_PLACES=78, PETRI_TRANSITIONS=81} [2024-11-28 02:41:35,510 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, -6 predicate places. [2024-11-28 02:41:35,510 INFO L471 AbstractCegarLoop]: Abstraction has has 78 places, 81 transitions, 189 flow [2024-11-28 02:41:35,511 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 44.75) internal successors, (179), 4 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:41:35,511 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 02:41:35,511 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-11-28 02:41:35,511 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-28 02:41:35,511 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-28 02:41:35,513 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:41:35,513 INFO L85 PathProgramCache]: Analyzing trace with hash 26991385, now seen corresponding path program 1 times [2024-11-28 02:41:35,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:41:35,514 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [514287631] [2024-11-28 02:41:35,514 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:41:35,514 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:41:35,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:41:35,883 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:41:35,883 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:41:35,883 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [514287631] [2024-11-28 02:41:35,884 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [514287631] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 02:41:35,884 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 02:41:35,885 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-28 02:41:35,885 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544996705] [2024-11-28 02:41:35,885 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 02:41:35,885 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-28 02:41:35,885 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:41:35,886 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-28 02:41:35,886 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-28 02:41:36,078 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 87 [2024-11-28 02:41:36,078 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 81 transitions, 189 flow. Second operand has 5 states, 5 states have (on average 44.8) internal successors, (224), 5 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:41:36,079 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 02:41:36,079 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 87 [2024-11-28 02:41:36,080 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 02:41:36,530 INFO L124 PetriNetUnfolderBase]: 979/1708 cut-off events. [2024-11-28 02:41:36,530 INFO L125 PetriNetUnfolderBase]: For 10/10 co-relation queries the response was YES. [2024-11-28 02:41:36,534 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3090 conditions, 1708 events. 979/1708 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 9526 event pairs, 608 based on Foata normal form. 0/1215 useless extension candidates. Maximal degree in co-relation 3065. Up to 1330 conditions per place. [2024-11-28 02:41:36,547 INFO L140 encePairwiseOnDemand]: 79/87 looper letters, 40 selfloop transitions, 7 changer transitions 0/84 dead transitions. [2024-11-28 02:41:36,548 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 84 transitions, 289 flow [2024-11-28 02:41:36,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-28 02:41:36,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-28 02:41:36,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 268 transitions. [2024-11-28 02:41:36,550 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6160919540229886 [2024-11-28 02:41:36,550 INFO L175 Difference]: Start difference. First operand has 78 places, 81 transitions, 189 flow. Second operand 5 states and 268 transitions. [2024-11-28 02:41:36,550 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 84 transitions, 289 flow [2024-11-28 02:41:36,552 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 84 transitions, 286 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-28 02:41:36,553 INFO L231 Difference]: Finished difference. Result has 83 places, 84 transitions, 223 flow [2024-11-28 02:41:36,554 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=186, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=223, PETRI_PLACES=83, PETRI_TRANSITIONS=84} [2024-11-28 02:41:36,557 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, -1 predicate places. [2024-11-28 02:41:36,558 INFO L471 AbstractCegarLoop]: Abstraction has has 83 places, 84 transitions, 223 flow [2024-11-28 02:41:36,558 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 44.8) internal successors, (224), 5 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:41:36,558 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 02:41:36,558 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2024-11-28 02:41:36,558 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-28 02:41:36,558 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-28 02:41:36,559 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:41:36,559 INFO L85 PathProgramCache]: Analyzing trace with hash 836745591, now seen corresponding path program 1 times [2024-11-28 02:41:36,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:41:36,559 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005881433] [2024-11-28 02:41:36,559 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:41:36,559 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:41:36,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:41:36,944 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:41:36,945 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:41:36,945 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1005881433] [2024-11-28 02:41:36,945 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1005881433] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:41:36,945 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1973955239] [2024-11-28 02:41:36,945 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:41:36,945 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:41:36,946 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bbc2480-f651-4e25-abd7-0db36f997a06/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:41:36,951 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bbc2480-f651-4e25-abd7-0db36f997a06/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:41:36,952 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bbc2480-f651-4e25-abd7-0db36f997a06/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-28 02:41:37,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:41:37,057 INFO L256 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-11-28 02:41:37,070 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:41:37,154 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2024-11-28 02:41:37,451 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:41:37,451 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:41:37,590 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:41:37,590 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1973955239] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:41:37,590 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:41:37,590 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2024-11-28 02:41:37,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459962963] [2024-11-28 02:41:37,590 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:41:37,591 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-28 02:41:37,591 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:41:37,591 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-28 02:41:37,592 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2024-11-28 02:41:38,370 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 87 [2024-11-28 02:41:38,371 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 84 transitions, 223 flow. Second operand has 11 states, 11 states have (on average 45.36363636363637) internal successors, (499), 11 states have internal predecessors, (499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:41:38,371 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 02:41:38,371 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 87 [2024-11-28 02:41:38,371 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 02:41:38,906 INFO L124 PetriNetUnfolderBase]: 979/1707 cut-off events. [2024-11-28 02:41:38,906 INFO L125 PetriNetUnfolderBase]: For 13/13 co-relation queries the response was YES. [2024-11-28 02:41:38,910 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3103 conditions, 1707 events. 979/1707 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 9530 event pairs, 608 based on Foata normal form. 0/1217 useless extension candidates. Maximal degree in co-relation 3075. Up to 1330 conditions per place. [2024-11-28 02:41:38,921 INFO L140 encePairwiseOnDemand]: 82/87 looper letters, 39 selfloop transitions, 7 changer transitions 0/83 dead transitions. [2024-11-28 02:41:38,921 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 83 transitions, 311 flow [2024-11-28 02:41:38,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-28 02:41:38,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-28 02:41:38,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 308 transitions. [2024-11-28 02:41:38,924 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5900383141762452 [2024-11-28 02:41:38,924 INFO L175 Difference]: Start difference. First operand has 83 places, 84 transitions, 223 flow. Second operand 6 states and 308 transitions. [2024-11-28 02:41:38,924 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 83 transitions, 311 flow [2024-11-28 02:41:38,925 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 83 transitions, 310 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-28 02:41:38,927 INFO L231 Difference]: Finished difference. Result has 86 places, 83 transitions, 232 flow [2024-11-28 02:41:38,927 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=218, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=232, PETRI_PLACES=86, PETRI_TRANSITIONS=83} [2024-11-28 02:41:38,928 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, 2 predicate places. [2024-11-28 02:41:38,928 INFO L471 AbstractCegarLoop]: Abstraction has has 86 places, 83 transitions, 232 flow [2024-11-28 02:41:38,928 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 45.36363636363637) internal successors, (499), 11 states have internal predecessors, (499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:41:38,928 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 02:41:38,929 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-11-28 02:41:38,941 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bbc2480-f651-4e25-abd7-0db36f997a06/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-28 02:41:39,133 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bbc2480-f651-4e25-abd7-0db36f997a06/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:41:39,134 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-28 02:41:39,134 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:41:39,134 INFO L85 PathProgramCache]: Analyzing trace with hash 836735387, now seen corresponding path program 1 times [2024-11-28 02:41:39,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:41:39,135 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [100664275] [2024-11-28 02:41:39,135 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:41:39,135 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:41:39,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:41:39,337 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:41:39,337 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:41:39,337 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [100664275] [2024-11-28 02:41:39,337 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [100664275] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 02:41:39,337 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 02:41:39,337 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-28 02:41:39,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246414008] [2024-11-28 02:41:39,337 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 02:41:39,338 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-28 02:41:39,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:41:39,338 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-28 02:41:39,338 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-28 02:41:39,516 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 87 [2024-11-28 02:41:39,516 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 83 transitions, 232 flow. Second operand has 5 states, 5 states have (on average 45.0) internal successors, (225), 5 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:41:39,516 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 02:41:39,517 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 87 [2024-11-28 02:41:39,517 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 02:41:39,872 INFO L124 PetriNetUnfolderBase]: 980/1710 cut-off events. [2024-11-28 02:41:39,872 INFO L125 PetriNetUnfolderBase]: For 13/13 co-relation queries the response was YES. [2024-11-28 02:41:39,877 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3116 conditions, 1710 events. 980/1710 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 9520 event pairs, 608 based on Foata normal form. 0/1219 useless extension candidates. Maximal degree in co-relation 3083. Up to 1332 conditions per place. [2024-11-28 02:41:39,888 INFO L140 encePairwiseOnDemand]: 78/87 looper letters, 40 selfloop transitions, 9 changer transitions 0/86 dead transitions. [2024-11-28 02:41:39,888 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 86 transitions, 336 flow [2024-11-28 02:41:39,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-28 02:41:39,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-28 02:41:39,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 267 transitions. [2024-11-28 02:41:39,890 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6137931034482759 [2024-11-28 02:41:39,890 INFO L175 Difference]: Start difference. First operand has 86 places, 83 transitions, 232 flow. Second operand 5 states and 267 transitions. [2024-11-28 02:41:39,890 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 86 transitions, 336 flow [2024-11-28 02:41:39,892 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 86 transitions, 302 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-11-28 02:41:39,894 INFO L231 Difference]: Finished difference. Result has 84 places, 86 transitions, 241 flow [2024-11-28 02:41:39,894 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=198, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=241, PETRI_PLACES=84, PETRI_TRANSITIONS=86} [2024-11-28 02:41:39,902 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, 0 predicate places. [2024-11-28 02:41:39,902 INFO L471 AbstractCegarLoop]: Abstraction has has 84 places, 86 transitions, 241 flow [2024-11-28 02:41:39,903 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 45.0) internal successors, (225), 5 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:41:39,903 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 02:41:39,903 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2024-11-28 02:41:39,903 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-28 02:41:39,903 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-28 02:41:39,903 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:41:39,904 INFO L85 PathProgramCache]: Analyzing trace with hash 168943895, now seen corresponding path program 1 times [2024-11-28 02:41:39,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:41:39,904 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [501316763] [2024-11-28 02:41:39,904 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:41:39,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:41:39,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:41:40,208 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:41:40,209 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:41:40,209 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [501316763] [2024-11-28 02:41:40,209 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [501316763] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:41:40,209 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [210265926] [2024-11-28 02:41:40,209 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:41:40,209 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:41:40,209 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bbc2480-f651-4e25-abd7-0db36f997a06/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:41:40,211 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bbc2480-f651-4e25-abd7-0db36f997a06/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:41:40,214 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bbc2480-f651-4e25-abd7-0db36f997a06/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-28 02:41:40,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:41:40,299 INFO L256 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-28 02:41:40,301 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:41:40,319 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2024-11-28 02:41:40,534 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:41:40,535 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:41:40,707 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:41:40,707 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [210265926] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:41:40,707 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:41:40,708 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2024-11-28 02:41:40,708 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69392929] [2024-11-28 02:41:40,708 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:41:40,708 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-28 02:41:40,708 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:41:40,709 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-28 02:41:40,709 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2024-11-28 02:41:41,630 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 87 [2024-11-28 02:41:41,631 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 86 transitions, 241 flow. Second operand has 13 states, 13 states have (on average 45.30769230769231) internal successors, (589), 13 states have internal predecessors, (589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:41:41,631 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 02:41:41,632 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 87 [2024-11-28 02:41:41,632 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 02:41:42,252 INFO L124 PetriNetUnfolderBase]: 982/1715 cut-off events. [2024-11-28 02:41:42,252 INFO L125 PetriNetUnfolderBase]: For 18/18 co-relation queries the response was YES. [2024-11-28 02:41:42,255 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3131 conditions, 1715 events. 982/1715 cut-off events. For 18/18 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 9544 event pairs, 608 based on Foata normal form. 0/1227 useless extension candidates. Maximal degree in co-relation 3079. Up to 1326 conditions per place. [2024-11-28 02:41:42,266 INFO L140 encePairwiseOnDemand]: 79/87 looper letters, 36 selfloop transitions, 18 changer transitions 0/91 dead transitions. [2024-11-28 02:41:42,266 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 91 transitions, 368 flow [2024-11-28 02:41:42,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-28 02:41:42,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-28 02:41:42,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 449 transitions. [2024-11-28 02:41:42,268 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5734355044699873 [2024-11-28 02:41:42,268 INFO L175 Difference]: Start difference. First operand has 84 places, 86 transitions, 241 flow. Second operand 9 states and 449 transitions. [2024-11-28 02:41:42,268 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 91 transitions, 368 flow [2024-11-28 02:41:42,269 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 91 transitions, 360 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-28 02:41:42,271 INFO L231 Difference]: Finished difference. Result has 89 places, 91 transitions, 288 flow [2024-11-28 02:41:42,271 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=230, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=288, PETRI_PLACES=89, PETRI_TRANSITIONS=91} [2024-11-28 02:41:42,272 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, 5 predicate places. [2024-11-28 02:41:42,272 INFO L471 AbstractCegarLoop]: Abstraction has has 89 places, 91 transitions, 288 flow [2024-11-28 02:41:42,272 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 45.30769230769231) internal successors, (589), 13 states have internal predecessors, (589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:41:42,273 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 02:41:42,273 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1] [2024-11-28 02:41:42,283 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bbc2480-f651-4e25-abd7-0db36f997a06/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-28 02:41:42,473 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bbc2480-f651-4e25-abd7-0db36f997a06/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:41:42,473 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-28 02:41:42,474 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:41:42,474 INFO L85 PathProgramCache]: Analyzing trace with hash 943849838, now seen corresponding path program 1 times [2024-11-28 02:41:42,474 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:41:42,474 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [12330378] [2024-11-28 02:41:42,474 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:41:42,474 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:41:42,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:41:42,778 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:41:42,778 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:41:42,778 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [12330378] [2024-11-28 02:41:42,778 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [12330378] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:41:42,778 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1691302018] [2024-11-28 02:41:42,779 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:41:42,779 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:41:42,779 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bbc2480-f651-4e25-abd7-0db36f997a06/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:41:42,781 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bbc2480-f651-4e25-abd7-0db36f997a06/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:41:42,784 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bbc2480-f651-4e25-abd7-0db36f997a06/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-28 02:41:42,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:41:42,871 INFO L256 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-28 02:41:42,873 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:41:42,890 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2024-11-28 02:41:43,095 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:41:43,095 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:41:43,310 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:41:43,310 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1691302018] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:41:43,310 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:41:43,310 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2024-11-28 02:41:43,310 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477473706] [2024-11-28 02:41:43,311 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:41:43,311 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-28 02:41:43,311 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:41:43,311 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-28 02:41:43,312 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2024-11-28 02:41:44,237 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 87 [2024-11-28 02:41:44,238 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 91 transitions, 288 flow. Second operand has 13 states, 13 states have (on average 45.46153846153846) internal successors, (591), 13 states have internal predecessors, (591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:41:44,238 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 02:41:44,238 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 87 [2024-11-28 02:41:44,238 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 02:41:44,870 INFO L124 PetriNetUnfolderBase]: 982/1714 cut-off events. [2024-11-28 02:41:44,871 INFO L125 PetriNetUnfolderBase]: For 17/17 co-relation queries the response was YES. [2024-11-28 02:41:44,874 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3142 conditions, 1714 events. 982/1714 cut-off events. For 17/17 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 9549 event pairs, 608 based on Foata normal form. 0/1227 useless extension candidates. Maximal degree in co-relation 3087. Up to 1327 conditions per place. [2024-11-28 02:41:44,893 INFO L140 encePairwiseOnDemand]: 78/87 looper letters, 34 selfloop transitions, 19 changer transitions 0/90 dead transitions. [2024-11-28 02:41:44,893 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 90 transitions, 390 flow [2024-11-28 02:41:44,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-28 02:41:44,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-28 02:41:44,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 353 transitions. [2024-11-28 02:41:44,899 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5796387520525451 [2024-11-28 02:41:44,899 INFO L175 Difference]: Start difference. First operand has 89 places, 91 transitions, 288 flow. Second operand 7 states and 353 transitions. [2024-11-28 02:41:44,899 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 90 transitions, 390 flow [2024-11-28 02:41:44,901 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 90 transitions, 357 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-11-28 02:41:44,902 INFO L231 Difference]: Finished difference. Result has 89 places, 90 transitions, 289 flow [2024-11-28 02:41:44,905 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=251, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=289, PETRI_PLACES=89, PETRI_TRANSITIONS=90} [2024-11-28 02:41:44,906 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, 5 predicate places. [2024-11-28 02:41:44,906 INFO L471 AbstractCegarLoop]: Abstraction has has 89 places, 90 transitions, 289 flow [2024-11-28 02:41:44,907 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 45.46153846153846) internal successors, (591), 13 states have internal predecessors, (591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:41:44,907 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 02:41:44,907 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:41:44,916 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bbc2480-f651-4e25-abd7-0db36f997a06/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-28 02:41:45,107 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bbc2480-f651-4e25-abd7-0db36f997a06/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:41:45,107 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-28 02:41:45,108 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:41:45,108 INFO L85 PathProgramCache]: Analyzing trace with hash -802325547, now seen corresponding path program 1 times [2024-11-28 02:41:45,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:41:45,108 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130956910] [2024-11-28 02:41:45,108 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:41:45,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:41:45,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:41:45,200 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:41:45,201 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:41:45,201 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130956910] [2024-11-28 02:41:45,201 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [130956910] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 02:41:45,201 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 02:41:45,201 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-28 02:41:45,201 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1154000664] [2024-11-28 02:41:45,201 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 02:41:45,202 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-28 02:41:45,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:41:45,202 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-28 02:41:45,202 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-28 02:41:45,238 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 87 [2024-11-28 02:41:45,239 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 90 transitions, 289 flow. Second operand has 5 states, 5 states have (on average 47.4) internal successors, (237), 5 states have internal predecessors, (237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:41:45,239 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 02:41:45,239 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 87 [2024-11-28 02:41:45,239 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 02:41:45,695 INFO L124 PetriNetUnfolderBase]: 1836/3076 cut-off events. [2024-11-28 02:41:45,695 INFO L125 PetriNetUnfolderBase]: For 14/14 co-relation queries the response was YES. [2024-11-28 02:41:45,702 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5771 conditions, 3076 events. 1836/3076 cut-off events. For 14/14 co-relation queries the response was YES. Maximal size of possible extension queue 206. Compared 18238 event pairs, 797 based on Foata normal form. 0/2271 useless extension candidates. Maximal degree in co-relation 3647. Up to 1570 conditions per place. [2024-11-28 02:41:45,716 INFO L140 encePairwiseOnDemand]: 78/87 looper letters, 102 selfloop transitions, 9 changer transitions 0/147 dead transitions. [2024-11-28 02:41:45,716 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 147 transitions, 689 flow [2024-11-28 02:41:45,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-28 02:41:45,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-28 02:41:45,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 373 transitions. [2024-11-28 02:41:45,719 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.7145593869731801 [2024-11-28 02:41:45,721 INFO L175 Difference]: Start difference. First operand has 89 places, 90 transitions, 289 flow. Second operand 6 states and 373 transitions. [2024-11-28 02:41:45,722 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 147 transitions, 689 flow [2024-11-28 02:41:45,723 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 147 transitions, 625 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-11-28 02:41:45,725 INFO L231 Difference]: Finished difference. Result has 91 places, 96 transitions, 318 flow [2024-11-28 02:41:45,725 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=250, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=318, PETRI_PLACES=91, PETRI_TRANSITIONS=96} [2024-11-28 02:41:45,726 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, 7 predicate places. [2024-11-28 02:41:45,726 INFO L471 AbstractCegarLoop]: Abstraction has has 91 places, 96 transitions, 318 flow [2024-11-28 02:41:45,726 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 47.4) internal successors, (237), 5 states have internal predecessors, (237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:41:45,726 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 02:41:45,726 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:41:45,726 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-28 02:41:45,727 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-28 02:41:45,727 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:41:45,727 INFO L85 PathProgramCache]: Analyzing trace with hash 1997190732, now seen corresponding path program 1 times [2024-11-28 02:41:45,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:41:45,727 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105678463] [2024-11-28 02:41:45,727 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:41:45,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:41:45,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:41:45,836 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 02:41:45,836 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:41:45,836 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1105678463] [2024-11-28 02:41:45,836 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1105678463] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 02:41:45,837 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 02:41:45,837 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-28 02:41:45,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398004217] [2024-11-28 02:41:45,837 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 02:41:45,837 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-28 02:41:45,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:41:45,838 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-28 02:41:45,838 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-28 02:41:45,883 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 87 [2024-11-28 02:41:45,884 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 96 transitions, 318 flow. Second operand has 5 states, 5 states have (on average 47.8) internal successors, (239), 5 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:41:45,884 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 02:41:45,884 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 87 [2024-11-28 02:41:45,884 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 02:41:46,543 INFO L124 PetriNetUnfolderBase]: 3088/5520 cut-off events. [2024-11-28 02:41:46,544 INFO L125 PetriNetUnfolderBase]: For 555/555 co-relation queries the response was YES. [2024-11-28 02:41:46,557 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10466 conditions, 5520 events. 3088/5520 cut-off events. For 555/555 co-relation queries the response was YES. Maximal size of possible extension queue 371. Compared 38959 event pairs, 1505 based on Foata normal form. 0/4017 useless extension candidates. Maximal degree in co-relation 5956. Up to 2730 conditions per place. [2024-11-28 02:41:46,583 INFO L140 encePairwiseOnDemand]: 80/87 looper letters, 100 selfloop transitions, 11 changer transitions 0/147 dead transitions. [2024-11-28 02:41:46,583 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 147 transitions, 687 flow [2024-11-28 02:41:46,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-28 02:41:46,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-28 02:41:46,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 366 transitions. [2024-11-28 02:41:46,586 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.7011494252873564 [2024-11-28 02:41:46,586 INFO L175 Difference]: Start difference. First operand has 91 places, 96 transitions, 318 flow. Second operand 6 states and 366 transitions. [2024-11-28 02:41:46,587 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 147 transitions, 687 flow [2024-11-28 02:41:46,590 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 147 transitions, 682 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-28 02:41:46,595 INFO L231 Difference]: Finished difference. Result has 97 places, 101 transitions, 386 flow [2024-11-28 02:41:46,596 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=313, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=386, PETRI_PLACES=97, PETRI_TRANSITIONS=101} [2024-11-28 02:41:46,596 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, 13 predicate places. [2024-11-28 02:41:46,596 INFO L471 AbstractCegarLoop]: Abstraction has has 97 places, 101 transitions, 386 flow [2024-11-28 02:41:46,597 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 47.8) internal successors, (239), 5 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:41:46,597 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 02:41:46,597 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:41:46,597 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-11-28 02:41:46,597 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-28 02:41:46,597 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:41:46,597 INFO L85 PathProgramCache]: Analyzing trace with hash -1128627568, now seen corresponding path program 1 times [2024-11-28 02:41:46,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:41:46,598 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668655487] [2024-11-28 02:41:46,598 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:41:46,600 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:41:46,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:41:46,709 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 02:41:46,710 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:41:46,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668655487] [2024-11-28 02:41:46,710 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [668655487] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 02:41:46,710 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 02:41:46,710 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-28 02:41:46,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877083978] [2024-11-28 02:41:46,710 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 02:41:46,711 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-28 02:41:46,711 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:41:46,711 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-28 02:41:46,711 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-28 02:41:46,746 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 87 [2024-11-28 02:41:46,747 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 101 transitions, 386 flow. Second operand has 5 states, 5 states have (on average 47.8) internal successors, (239), 5 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:41:46,747 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 02:41:46,747 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 87 [2024-11-28 02:41:46,747 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 02:41:47,355 INFO L124 PetriNetUnfolderBase]: 2742/4882 cut-off events. [2024-11-28 02:41:47,356 INFO L125 PetriNetUnfolderBase]: For 994/994 co-relation queries the response was YES. [2024-11-28 02:41:47,371 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9758 conditions, 4882 events. 2742/4882 cut-off events. For 994/994 co-relation queries the response was YES. Maximal size of possible extension queue 328. Compared 33432 event pairs, 1356 based on Foata normal form. 50/3747 useless extension candidates. Maximal degree in co-relation 5359. Up to 2542 conditions per place. [2024-11-28 02:41:47,393 INFO L140 encePairwiseOnDemand]: 80/87 looper letters, 93 selfloop transitions, 12 changer transitions 0/141 dead transitions. [2024-11-28 02:41:47,394 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 141 transitions, 701 flow [2024-11-28 02:41:47,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-28 02:41:47,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-28 02:41:47,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 361 transitions. [2024-11-28 02:41:47,396 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6915708812260536 [2024-11-28 02:41:47,396 INFO L175 Difference]: Start difference. First operand has 97 places, 101 transitions, 386 flow. Second operand 6 states and 361 transitions. [2024-11-28 02:41:47,396 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 141 transitions, 701 flow [2024-11-28 02:41:47,401 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 141 transitions, 696 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-28 02:41:47,403 INFO L231 Difference]: Finished difference. Result has 103 places, 103 transitions, 429 flow [2024-11-28 02:41:47,403 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=381, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=429, PETRI_PLACES=103, PETRI_TRANSITIONS=103} [2024-11-28 02:41:47,404 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, 19 predicate places. [2024-11-28 02:41:47,405 INFO L471 AbstractCegarLoop]: Abstraction has has 103 places, 103 transitions, 429 flow [2024-11-28 02:41:47,405 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 47.8) internal successors, (239), 5 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:41:47,405 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 02:41:47,405 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:41:47,405 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-11-28 02:41:47,405 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-28 02:41:47,406 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:41:47,406 INFO L85 PathProgramCache]: Analyzing trace with hash -8743217, now seen corresponding path program 1 times [2024-11-28 02:41:47,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:41:47,407 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [65041313] [2024-11-28 02:41:47,407 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:41:47,407 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:41:47,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:41:47,922 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 02:41:47,922 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:41:47,922 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [65041313] [2024-11-28 02:41:47,923 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [65041313] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:41:47,923 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [490959709] [2024-11-28 02:41:47,923 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:41:47,923 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:41:47,923 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bbc2480-f651-4e25-abd7-0db36f997a06/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:41:47,925 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bbc2480-f651-4e25-abd7-0db36f997a06/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:41:47,929 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bbc2480-f651-4e25-abd7-0db36f997a06/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-28 02:41:48,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:41:48,015 INFO L256 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-11-28 02:41:48,017 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:41:48,023 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-28 02:41:48,104 INFO L349 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2024-11-28 02:41:48,104 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 16 [2024-11-28 02:41:48,109 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-11-28 02:41:48,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-28 02:41:48,145 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-11-28 02:41:48,157 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-28 02:41:48,158 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-28 02:41:48,183 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-28 02:41:48,183 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:41:48,433 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 100 treesize of output 96 [2024-11-28 02:41:48,672 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-28 02:41:48,673 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [490959709] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:41:48,673 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:41:48,673 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 12 [2024-11-28 02:41:48,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201674982] [2024-11-28 02:41:48,673 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:41:48,673 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-28 02:41:48,674 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:41:48,675 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-28 02:41:48,676 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2024-11-28 02:41:52,923 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 33 out of 87 [2024-11-28 02:41:52,924 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 103 transitions, 429 flow. Second operand has 14 states, 14 states have (on average 34.857142857142854) internal successors, (488), 14 states have internal predecessors, (488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:41:52,924 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 02:41:52,924 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 33 of 87 [2024-11-28 02:41:52,924 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 02:41:55,000 INFO L124 PetriNetUnfolderBase]: 6392/11319 cut-off events. [2024-11-28 02:41:55,000 INFO L125 PetriNetUnfolderBase]: For 3084/3084 co-relation queries the response was YES. [2024-11-28 02:41:55,034 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22423 conditions, 11319 events. 6392/11319 cut-off events. For 3084/3084 co-relation queries the response was YES. Maximal size of possible extension queue 506. Compared 85313 event pairs, 2611 based on Foata normal form. 0/8912 useless extension candidates. Maximal degree in co-relation 13269. Up to 2792 conditions per place. [2024-11-28 02:41:55,080 INFO L140 encePairwiseOnDemand]: 71/87 looper letters, 140 selfloop transitions, 25 changer transitions 0/192 dead transitions. [2024-11-28 02:41:55,080 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 192 transitions, 992 flow [2024-11-28 02:41:55,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-28 02:41:55,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-28 02:41:55,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 457 transitions. [2024-11-28 02:41:55,083 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5836526181353767 [2024-11-28 02:41:55,083 INFO L175 Difference]: Start difference. First operand has 103 places, 103 transitions, 429 flow. Second operand 9 states and 457 transitions. [2024-11-28 02:41:55,083 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 192 transitions, 992 flow [2024-11-28 02:41:55,089 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 192 transitions, 974 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-28 02:41:55,091 INFO L231 Difference]: Finished difference. Result has 108 places, 103 transitions, 493 flow [2024-11-28 02:41:55,091 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=407, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=493, PETRI_PLACES=108, PETRI_TRANSITIONS=103} [2024-11-28 02:41:55,092 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, 24 predicate places. [2024-11-28 02:41:55,092 INFO L471 AbstractCegarLoop]: Abstraction has has 108 places, 103 transitions, 493 flow [2024-11-28 02:41:55,093 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 34.857142857142854) internal successors, (488), 14 states have internal predecessors, (488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:41:55,093 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 02:41:55,093 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:41:55,103 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bbc2480-f651-4e25-abd7-0db36f997a06/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-28 02:41:55,297 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bbc2480-f651-4e25-abd7-0db36f997a06/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:41:55,297 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-28 02:41:55,298 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:41:55,298 INFO L85 PathProgramCache]: Analyzing trace with hash -896023095, now seen corresponding path program 1 times [2024-11-28 02:41:55,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:41:55,298 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890651160] [2024-11-28 02:41:55,298 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:41:55,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:41:55,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:41:55,393 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-28 02:41:55,394 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:41:55,394 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890651160] [2024-11-28 02:41:55,394 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [890651160] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 02:41:55,394 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 02:41:55,394 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-28 02:41:55,394 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719144642] [2024-11-28 02:41:55,394 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 02:41:55,395 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-28 02:41:55,395 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:41:55,395 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-28 02:41:55,395 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-28 02:41:55,438 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 87 [2024-11-28 02:41:55,438 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 103 transitions, 493 flow. Second operand has 5 states, 5 states have (on average 48.2) internal successors, (241), 5 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:41:55,439 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 02:41:55,439 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 87 [2024-11-28 02:41:55,439 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 02:41:56,529 INFO L124 PetriNetUnfolderBase]: 7020/12674 cut-off events. [2024-11-28 02:41:56,529 INFO L125 PetriNetUnfolderBase]: For 6787/6868 co-relation queries the response was YES. [2024-11-28 02:41:56,571 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26699 conditions, 12674 events. 7020/12674 cut-off events. For 6787/6868 co-relation queries the response was YES. Maximal size of possible extension queue 611. Compared 99231 event pairs, 3465 based on Foata normal form. 203/10148 useless extension candidates. Maximal degree in co-relation 22324. Up to 5965 conditions per place. [2024-11-28 02:41:56,618 INFO L140 encePairwiseOnDemand]: 82/87 looper letters, 104 selfloop transitions, 15 changer transitions 0/153 dead transitions. [2024-11-28 02:41:56,618 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 153 transitions, 925 flow [2024-11-28 02:41:56,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-28 02:41:56,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-28 02:41:56,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 314 transitions. [2024-11-28 02:41:56,620 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.7218390804597701 [2024-11-28 02:41:56,620 INFO L175 Difference]: Start difference. First operand has 108 places, 103 transitions, 493 flow. Second operand 5 states and 314 transitions. [2024-11-28 02:41:56,620 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 153 transitions, 925 flow [2024-11-28 02:41:56,629 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 153 transitions, 865 flow, removed 13 selfloop flow, removed 4 redundant places. [2024-11-28 02:41:56,631 INFO L231 Difference]: Finished difference. Result has 110 places, 105 transitions, 499 flow [2024-11-28 02:41:56,631 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=445, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=499, PETRI_PLACES=110, PETRI_TRANSITIONS=105} [2024-11-28 02:41:56,632 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, 26 predicate places. [2024-11-28 02:41:56,632 INFO L471 AbstractCegarLoop]: Abstraction has has 110 places, 105 transitions, 499 flow [2024-11-28 02:41:56,632 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 48.2) internal successors, (241), 5 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:41:56,632 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 02:41:56,633 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:41:56,633 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-11-28 02:41:56,633 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-28 02:41:56,633 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:41:56,633 INFO L85 PathProgramCache]: Analyzing trace with hash -640342412, now seen corresponding path program 1 times [2024-11-28 02:41:56,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:41:56,633 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1424522701] [2024-11-28 02:41:56,633 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:41:56,634 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:41:56,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:41:56,723 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:41:56,723 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:41:56,723 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1424522701] [2024-11-28 02:41:56,723 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1424522701] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 02:41:56,724 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 02:41:56,724 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-28 02:41:56,724 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677953355] [2024-11-28 02:41:56,724 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 02:41:56,724 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-28 02:41:56,724 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:41:56,725 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-28 02:41:56,725 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-28 02:41:56,761 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 87 [2024-11-28 02:41:56,762 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 105 transitions, 499 flow. Second operand has 5 states, 5 states have (on average 48.2) internal successors, (241), 5 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:41:56,762 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 02:41:56,762 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 87 [2024-11-28 02:41:56,762 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 02:41:58,039 INFO L124 PetriNetUnfolderBase]: 6588/13356 cut-off events. [2024-11-28 02:41:58,039 INFO L125 PetriNetUnfolderBase]: For 8195/8305 co-relation queries the response was YES. [2024-11-28 02:41:58,064 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27379 conditions, 13356 events. 6588/13356 cut-off events. For 8195/8305 co-relation queries the response was YES. Maximal size of possible extension queue 597. Compared 116206 event pairs, 4352 based on Foata normal form. 20/10134 useless extension candidates. Maximal degree in co-relation 22490. Up to 7378 conditions per place. [2024-11-28 02:41:58,120 INFO L140 encePairwiseOnDemand]: 78/87 looper letters, 109 selfloop transitions, 11 changer transitions 0/152 dead transitions. [2024-11-28 02:41:58,120 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 152 transitions, 913 flow [2024-11-28 02:41:58,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-28 02:41:58,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-28 02:41:58,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 365 transitions. [2024-11-28 02:41:58,123 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6992337164750958 [2024-11-28 02:41:58,123 INFO L175 Difference]: Start difference. First operand has 110 places, 105 transitions, 499 flow. Second operand 6 states and 365 transitions. [2024-11-28 02:41:58,123 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 152 transitions, 913 flow [2024-11-28 02:41:58,136 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 152 transitions, 901 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-28 02:41:58,139 INFO L231 Difference]: Finished difference. Result has 113 places, 104 transitions, 509 flow [2024-11-28 02:41:58,139 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=472, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=509, PETRI_PLACES=113, PETRI_TRANSITIONS=104} [2024-11-28 02:41:58,140 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, 29 predicate places. [2024-11-28 02:41:58,140 INFO L471 AbstractCegarLoop]: Abstraction has has 113 places, 104 transitions, 509 flow [2024-11-28 02:41:58,140 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 48.2) internal successors, (241), 5 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:41:58,140 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 02:41:58,140 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:41:58,141 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-11-28 02:41:58,141 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-28 02:41:58,141 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:41:58,141 INFO L85 PathProgramCache]: Analyzing trace with hash -271038896, now seen corresponding path program 1 times [2024-11-28 02:41:58,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:41:58,142 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1743558778] [2024-11-28 02:41:58,142 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:41:58,142 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:41:58,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:41:58,452 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 02:41:58,452 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:41:58,452 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1743558778] [2024-11-28 02:41:58,453 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1743558778] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:41:58,453 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [710533004] [2024-11-28 02:41:58,453 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:41:58,453 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:41:58,453 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bbc2480-f651-4e25-abd7-0db36f997a06/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:41:58,455 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bbc2480-f651-4e25-abd7-0db36f997a06/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:41:58,460 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bbc2480-f651-4e25-abd7-0db36f997a06/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-28 02:41:58,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:41:58,565 INFO L256 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-28 02:41:58,566 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:41:58,575 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-28 02:41:58,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-28 02:41:58,642 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-11-28 02:41:58,650 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-28 02:41:58,650 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-28 02:41:58,727 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 02:41:58,727 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:41:58,883 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 48 [2024-11-28 02:41:58,967 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 02:41:58,968 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [710533004] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:41:58,968 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:41:58,968 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 12 [2024-11-28 02:41:58,968 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882894707] [2024-11-28 02:41:58,968 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:41:58,969 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-28 02:41:58,969 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:41:58,969 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-28 02:41:58,969 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2024-11-28 02:42:00,173 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 41 out of 87 [2024-11-28 02:42:00,174 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 104 transitions, 509 flow. Second operand has 13 states, 13 states have (on average 42.92307692307692) internal successors, (558), 13 states have internal predecessors, (558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:42:00,174 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 02:42:00,174 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 41 of 87 [2024-11-28 02:42:00,175 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 02:42:01,700 INFO L124 PetriNetUnfolderBase]: 6720/11981 cut-off events. [2024-11-28 02:42:01,700 INFO L125 PetriNetUnfolderBase]: For 7868/7868 co-relation queries the response was YES. [2024-11-28 02:42:01,725 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26688 conditions, 11981 events. 6720/11981 cut-off events. For 7868/7868 co-relation queries the response was YES. Maximal size of possible extension queue 500. Compared 90914 event pairs, 2542 based on Foata normal form. 0/10372 useless extension candidates. Maximal degree in co-relation 20698. Up to 3262 conditions per place. [2024-11-28 02:42:01,755 INFO L140 encePairwiseOnDemand]: 75/87 looper letters, 123 selfloop transitions, 27 changer transitions 0/180 dead transitions. [2024-11-28 02:42:01,755 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 180 transitions, 1023 flow [2024-11-28 02:42:01,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-28 02:42:01,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-28 02:42:01,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 498 transitions. [2024-11-28 02:42:01,756 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6360153256704981 [2024-11-28 02:42:01,756 INFO L175 Difference]: Start difference. First operand has 113 places, 104 transitions, 509 flow. Second operand 9 states and 498 transitions. [2024-11-28 02:42:01,756 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 180 transitions, 1023 flow [2024-11-28 02:42:01,767 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 180 transitions, 1010 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-28 02:42:01,769 INFO L231 Difference]: Finished difference. Result has 119 places, 106 transitions, 576 flow [2024-11-28 02:42:01,769 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=494, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=576, PETRI_PLACES=119, PETRI_TRANSITIONS=106} [2024-11-28 02:42:01,770 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, 35 predicate places. [2024-11-28 02:42:01,770 INFO L471 AbstractCegarLoop]: Abstraction has has 119 places, 106 transitions, 576 flow [2024-11-28 02:42:01,770 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 42.92307692307692) internal successors, (558), 13 states have internal predecessors, (558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:42:01,770 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 02:42:01,770 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:42:01,781 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bbc2480-f651-4e25-abd7-0db36f997a06/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-11-28 02:42:01,971 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bbc2480-f651-4e25-abd7-0db36f997a06/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-11-28 02:42:01,971 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-28 02:42:01,971 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:42:01,971 INFO L85 PathProgramCache]: Analyzing trace with hash -271038897, now seen corresponding path program 1 times [2024-11-28 02:42:01,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:42:01,972 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [518833197] [2024-11-28 02:42:01,972 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:42:01,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:42:01,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:42:02,079 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-28 02:42:02,079 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:42:02,080 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [518833197] [2024-11-28 02:42:02,080 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [518833197] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 02:42:02,080 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 02:42:02,080 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-28 02:42:02,080 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702075732] [2024-11-28 02:42:02,080 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 02:42:02,080 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-28 02:42:02,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:42:02,081 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-28 02:42:02,081 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-28 02:42:02,171 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 37 out of 87 [2024-11-28 02:42:02,172 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 106 transitions, 576 flow. Second operand has 4 states, 4 states have (on average 39.75) internal successors, (159), 4 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:42:02,172 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 02:42:02,172 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 37 of 87 [2024-11-28 02:42:02,172 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 02:42:03,567 INFO L124 PetriNetUnfolderBase]: 7503/13812 cut-off events. [2024-11-28 02:42:03,567 INFO L125 PetriNetUnfolderBase]: For 12171/12171 co-relation queries the response was YES. [2024-11-28 02:42:03,597 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31746 conditions, 13812 events. 7503/13812 cut-off events. For 12171/12171 co-relation queries the response was YES. Maximal size of possible extension queue 569. Compared 109789 event pairs, 5993 based on Foata normal form. 239/12235 useless extension candidates. Maximal degree in co-relation 20623. Up to 10822 conditions per place. [2024-11-28 02:42:03,629 INFO L140 encePairwiseOnDemand]: 80/87 looper letters, 63 selfloop transitions, 14 changer transitions 0/102 dead transitions. [2024-11-28 02:42:03,630 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 102 transitions, 722 flow [2024-11-28 02:42:03,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-28 02:42:03,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-28 02:42:03,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 230 transitions. [2024-11-28 02:42:03,631 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5287356321839081 [2024-11-28 02:42:03,631 INFO L175 Difference]: Start difference. First operand has 119 places, 106 transitions, 576 flow. Second operand 5 states and 230 transitions. [2024-11-28 02:42:03,631 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 102 transitions, 722 flow [2024-11-28 02:42:03,650 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 102 transitions, 669 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-11-28 02:42:03,651 INFO L231 Difference]: Finished difference. Result has 113 places, 102 transitions, 543 flow [2024-11-28 02:42:03,651 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=515, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=543, PETRI_PLACES=113, PETRI_TRANSITIONS=102} [2024-11-28 02:42:03,651 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, 29 predicate places. [2024-11-28 02:42:03,651 INFO L471 AbstractCegarLoop]: Abstraction has has 113 places, 102 transitions, 543 flow [2024-11-28 02:42:03,652 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 39.75) internal successors, (159), 4 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:42:03,652 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 02:42:03,652 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:42:03,652 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-11-28 02:42:03,652 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-28 02:42:03,652 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:42:03,653 INFO L85 PathProgramCache]: Analyzing trace with hash 381310895, now seen corresponding path program 1 times [2024-11-28 02:42:03,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:42:03,653 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1068681435] [2024-11-28 02:42:03,653 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:42:03,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:42:03,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:42:03,739 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 02:42:03,739 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:42:03,739 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1068681435] [2024-11-28 02:42:03,739 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1068681435] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 02:42:03,739 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 02:42:03,740 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-28 02:42:03,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052156143] [2024-11-28 02:42:03,740 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 02:42:03,740 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-28 02:42:03,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:42:03,741 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-28 02:42:03,741 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-28 02:42:03,789 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 87 [2024-11-28 02:42:03,789 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 102 transitions, 543 flow. Second operand has 5 states, 5 states have (on average 48.6) internal successors, (243), 5 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:42:03,789 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 02:42:03,789 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 87 [2024-11-28 02:42:03,789 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 02:42:04,594 INFO L124 PetriNetUnfolderBase]: 5704/10508 cut-off events. [2024-11-28 02:42:04,594 INFO L125 PetriNetUnfolderBase]: For 9674/9887 co-relation queries the response was YES. [2024-11-28 02:42:04,615 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23867 conditions, 10508 events. 5704/10508 cut-off events. For 9674/9887 co-relation queries the response was YES. Maximal size of possible extension queue 438. Compared 78948 event pairs, 3414 based on Foata normal form. 140/8881 useless extension candidates. Maximal degree in co-relation 15117. Up to 5405 conditions per place. [2024-11-28 02:42:04,638 INFO L140 encePairwiseOnDemand]: 82/87 looper letters, 102 selfloop transitions, 15 changer transitions 0/145 dead transitions. [2024-11-28 02:42:04,639 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 145 transitions, 973 flow [2024-11-28 02:42:04,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-28 02:42:04,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-28 02:42:04,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 307 transitions. [2024-11-28 02:42:04,641 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.7057471264367816 [2024-11-28 02:42:04,641 INFO L175 Difference]: Start difference. First operand has 113 places, 102 transitions, 543 flow. Second operand 5 states and 307 transitions. [2024-11-28 02:42:04,641 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 145 transitions, 973 flow [2024-11-28 02:42:04,649 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 145 transitions, 953 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-28 02:42:04,650 INFO L231 Difference]: Finished difference. Result has 116 places, 104 transitions, 577 flow [2024-11-28 02:42:04,650 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=523, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=577, PETRI_PLACES=116, PETRI_TRANSITIONS=104} [2024-11-28 02:42:04,651 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, 32 predicate places. [2024-11-28 02:42:04,651 INFO L471 AbstractCegarLoop]: Abstraction has has 116 places, 104 transitions, 577 flow [2024-11-28 02:42:04,651 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 48.6) internal successors, (243), 5 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:42:04,651 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 02:42:04,651 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:42:04,651 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-11-28 02:42:04,651 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-28 02:42:04,652 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:42:04,652 INFO L85 PathProgramCache]: Analyzing trace with hash -1804903849, now seen corresponding path program 1 times [2024-11-28 02:42:04,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:42:04,652 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [741827669] [2024-11-28 02:42:04,652 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:42:04,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:42:04,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:42:04,861 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-28 02:42:04,861 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:42:04,861 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [741827669] [2024-11-28 02:42:04,861 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [741827669] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:42:04,861 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1270759583] [2024-11-28 02:42:04,862 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:42:04,862 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:42:04,862 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bbc2480-f651-4e25-abd7-0db36f997a06/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:42:04,864 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bbc2480-f651-4e25-abd7-0db36f997a06/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:42:04,867 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bbc2480-f651-4e25-abd7-0db36f997a06/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-28 02:42:04,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:42:04,961 INFO L256 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-28 02:42:04,963 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:42:04,973 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-28 02:42:05,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-28 02:42:05,026 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-11-28 02:42:05,037 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-28 02:42:05,038 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-28 02:42:05,096 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-28 02:42:05,096 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:42:05,214 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 48 [2024-11-28 02:42:05,299 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-28 02:42:05,299 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1270759583] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:42:05,299 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:42:05,299 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 12 [2024-11-28 02:42:05,299 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869211719] [2024-11-28 02:42:05,299 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:42:05,300 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-28 02:42:05,300 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:42:05,300 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-28 02:42:05,300 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2024-11-28 02:42:06,341 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 40 out of 87 [2024-11-28 02:42:06,342 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 104 transitions, 577 flow. Second operand has 13 states, 13 states have (on average 42.38461538461539) internal successors, (551), 13 states have internal predecessors, (551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:42:06,342 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 02:42:06,342 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 40 of 87 [2024-11-28 02:42:06,342 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 02:42:08,404 INFO L124 PetriNetUnfolderBase]: 10512/18442 cut-off events. [2024-11-28 02:42:08,405 INFO L125 PetriNetUnfolderBase]: For 17744/18377 co-relation queries the response was YES. [2024-11-28 02:42:08,461 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42086 conditions, 18442 events. 10512/18442 cut-off events. For 17744/18377 co-relation queries the response was YES. Maximal size of possible extension queue 660. Compared 144396 event pairs, 3333 based on Foata normal form. 0/15529 useless extension candidates. Maximal degree in co-relation 29583. Up to 5819 conditions per place. [2024-11-28 02:42:08,521 INFO L140 encePairwiseOnDemand]: 75/87 looper letters, 131 selfloop transitions, 27 changer transitions 0/183 dead transitions. [2024-11-28 02:42:08,521 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 183 transitions, 1185 flow [2024-11-28 02:42:08,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-28 02:42:08,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-28 02:42:08,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 487 transitions. [2024-11-28 02:42:08,524 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6219667943805874 [2024-11-28 02:42:08,524 INFO L175 Difference]: Start difference. First operand has 116 places, 104 transitions, 577 flow. Second operand 9 states and 487 transitions. [2024-11-28 02:42:08,524 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 183 transitions, 1185 flow [2024-11-28 02:42:08,547 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 183 transitions, 1163 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-28 02:42:08,550 INFO L231 Difference]: Finished difference. Result has 123 places, 105 transitions, 627 flow [2024-11-28 02:42:08,550 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=553, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=627, PETRI_PLACES=123, PETRI_TRANSITIONS=105} [2024-11-28 02:42:08,550 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, 39 predicate places. [2024-11-28 02:42:08,550 INFO L471 AbstractCegarLoop]: Abstraction has has 123 places, 105 transitions, 627 flow [2024-11-28 02:42:08,551 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 42.38461538461539) internal successors, (551), 13 states have internal predecessors, (551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:42:08,551 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 02:42:08,551 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:42:08,558 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bbc2480-f651-4e25-abd7-0db36f997a06/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-28 02:42:08,751 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bbc2480-f651-4e25-abd7-0db36f997a06/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:42:08,751 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting thread2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-28 02:42:08,752 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:42:08,752 INFO L85 PathProgramCache]: Analyzing trace with hash -117443623, now seen corresponding path program 1 times [2024-11-28 02:42:08,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:42:08,752 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1643691067] [2024-11-28 02:42:08,752 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:42:08,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:42:08,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:42:08,828 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-28 02:42:08,828 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:42:08,828 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1643691067] [2024-11-28 02:42:08,828 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1643691067] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 02:42:08,828 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 02:42:08,828 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-28 02:42:08,828 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928519730] [2024-11-28 02:42:08,829 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 02:42:08,830 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-28 02:42:08,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:42:08,830 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-28 02:42:08,831 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-28 02:42:08,923 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 38 out of 87 [2024-11-28 02:42:08,923 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 105 transitions, 627 flow. Second operand has 4 states, 4 states have (on average 41.25) internal successors, (165), 4 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:42:08,923 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 02:42:08,923 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 38 of 87 [2024-11-28 02:42:08,924 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 02:42:10,474 INFO L124 PetriNetUnfolderBase]: 10024/18025 cut-off events. [2024-11-28 02:42:10,474 INFO L125 PetriNetUnfolderBase]: For 20656/21187 co-relation queries the response was YES. [2024-11-28 02:42:10,516 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42835 conditions, 18025 events. 10024/18025 cut-off events. For 20656/21187 co-relation queries the response was YES. Maximal size of possible extension queue 625. Compared 142225 event pairs, 8388 based on Foata normal form. 0/16780 useless extension candidates. Maximal degree in co-relation 29241. Up to 14502 conditions per place. [2024-11-28 02:42:10,557 INFO L140 encePairwiseOnDemand]: 81/87 looper letters, 69 selfloop transitions, 9 changer transitions 0/101 dead transitions. [2024-11-28 02:42:10,557 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 101 transitions, 775 flow [2024-11-28 02:42:10,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-28 02:42:10,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-28 02:42:10,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 196 transitions. [2024-11-28 02:42:10,558 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5632183908045977 [2024-11-28 02:42:10,558 INFO L175 Difference]: Start difference. First operand has 123 places, 105 transitions, 627 flow. Second operand 4 states and 196 transitions. [2024-11-28 02:42:10,558 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 101 transitions, 775 flow [2024-11-28 02:42:10,575 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 101 transitions, 725 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-11-28 02:42:10,576 INFO L231 Difference]: Finished difference. Result has 116 places, 101 transitions, 587 flow [2024-11-28 02:42:10,576 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=569, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=587, PETRI_PLACES=116, PETRI_TRANSITIONS=101} [2024-11-28 02:42:10,577 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, 32 predicate places. [2024-11-28 02:42:10,577 INFO L471 AbstractCegarLoop]: Abstraction has has 116 places, 101 transitions, 587 flow [2024-11-28 02:42:10,577 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 41.25) internal successors, (165), 4 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:42:10,577 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 02:42:10,577 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:42:10,577 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-11-28 02:42:10,577 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-28 02:42:10,578 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:42:10,578 INFO L85 PathProgramCache]: Analyzing trace with hash -117443622, now seen corresponding path program 1 times [2024-11-28 02:42:10,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:42:10,578 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618450271] [2024-11-28 02:42:10,578 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:42:10,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:42:10,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:42:10,779 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-28 02:42:10,780 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:42:10,780 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618450271] [2024-11-28 02:42:10,780 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1618450271] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:42:10,780 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1399764348] [2024-11-28 02:42:10,780 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:42:10,780 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:42:10,780 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bbc2480-f651-4e25-abd7-0db36f997a06/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:42:10,782 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bbc2480-f651-4e25-abd7-0db36f997a06/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:42:10,787 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bbc2480-f651-4e25-abd7-0db36f997a06/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-28 02:42:10,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:42:10,896 INFO L256 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-28 02:42:10,897 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:42:10,990 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-28 02:42:10,990 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:42:11,046 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2024-11-28 02:42:11,055 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-28 02:42:11,055 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1399764348] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:42:11,055 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:42:11,055 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2024-11-28 02:42:11,056 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075184382] [2024-11-28 02:42:11,056 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:42:11,056 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-28 02:42:11,056 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:42:11,058 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-28 02:42:11,058 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-11-28 02:42:11,575 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 87 [2024-11-28 02:42:11,576 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 101 transitions, 587 flow. Second operand has 11 states, 11 states have (on average 46.18181818181818) internal successors, (508), 11 states have internal predecessors, (508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:42:11,576 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 02:42:11,576 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 87 [2024-11-28 02:42:11,576 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 02:42:12,893 INFO L124 PetriNetUnfolderBase]: 9570/15634 cut-off events. [2024-11-28 02:42:12,893 INFO L125 PetriNetUnfolderBase]: For 18081/18591 co-relation queries the response was YES. [2024-11-28 02:42:12,943 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38576 conditions, 15634 events. 9570/15634 cut-off events. For 18081/18591 co-relation queries the response was YES. Maximal size of possible extension queue 528. Compared 107980 event pairs, 3801 based on Foata normal form. 0/14436 useless extension candidates. Maximal degree in co-relation 26965. Up to 4486 conditions per place. [2024-11-28 02:42:12,983 INFO L140 encePairwiseOnDemand]: 75/87 looper letters, 127 selfloop transitions, 27 changer transitions 0/176 dead transitions. [2024-11-28 02:42:12,983 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 176 transitions, 1189 flow [2024-11-28 02:42:12,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-28 02:42:12,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-28 02:42:12,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 427 transitions. [2024-11-28 02:42:12,985 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.7011494252873564 [2024-11-28 02:42:12,986 INFO L175 Difference]: Start difference. First operand has 116 places, 101 transitions, 587 flow. Second operand 7 states and 427 transitions. [2024-11-28 02:42:12,986 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 176 transitions, 1189 flow [2024-11-28 02:42:13,013 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 176 transitions, 1179 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-28 02:42:13,016 INFO L231 Difference]: Finished difference. Result has 121 places, 101 transitions, 647 flow [2024-11-28 02:42:13,016 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=575, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=647, PETRI_PLACES=121, PETRI_TRANSITIONS=101} [2024-11-28 02:42:13,017 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, 37 predicate places. [2024-11-28 02:42:13,017 INFO L471 AbstractCegarLoop]: Abstraction has has 121 places, 101 transitions, 647 flow [2024-11-28 02:42:13,017 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 46.18181818181818) internal successors, (508), 11 states have internal predecessors, (508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:42:13,017 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 02:42:13,017 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:42:13,027 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bbc2480-f651-4e25-abd7-0db36f997a06/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-11-28 02:42:13,222 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bbc2480-f651-4e25-abd7-0db36f997a06/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:42:13,222 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-28 02:42:13,222 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:42:13,223 INFO L85 PathProgramCache]: Analyzing trace with hash 19594581, now seen corresponding path program 1 times [2024-11-28 02:42:13,223 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:42:13,223 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1404666352] [2024-11-28 02:42:13,223 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:42:13,223 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:42:13,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:42:13,330 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 02:42:13,330 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:42:13,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1404666352] [2024-11-28 02:42:13,330 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1404666352] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:42:13,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [891160319] [2024-11-28 02:42:13,330 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:42:13,330 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:42:13,331 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bbc2480-f651-4e25-abd7-0db36f997a06/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:42:13,334 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bbc2480-f651-4e25-abd7-0db36f997a06/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:42:13,336 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bbc2480-f651-4e25-abd7-0db36f997a06/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-28 02:42:13,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:42:13,432 INFO L256 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-28 02:42:13,433 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:42:13,536 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-28 02:42:13,536 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:42:13,630 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-28 02:42:13,630 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [891160319] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:42:13,630 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:42:13,630 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 16 [2024-11-28 02:42:13,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112284442] [2024-11-28 02:42:13,631 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:42:13,631 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-28 02:42:13,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:42:13,632 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-28 02:42:13,632 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2024-11-28 02:42:14,044 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 87 [2024-11-28 02:42:14,044 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 101 transitions, 647 flow. Second operand has 16 states, 16 states have (on average 48.125) internal successors, (770), 16 states have internal predecessors, (770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:42:14,044 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 02:42:14,044 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 87 [2024-11-28 02:42:14,045 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 02:42:17,729 INFO L124 PetriNetUnfolderBase]: 23869/40217 cut-off events. [2024-11-28 02:42:17,729 INFO L125 PetriNetUnfolderBase]: For 57772/59044 co-relation queries the response was YES. [2024-11-28 02:42:17,835 INFO L83 FinitePrefix]: Finished finitePrefix Result has 102977 conditions, 40217 events. 23869/40217 cut-off events. For 57772/59044 co-relation queries the response was YES. Maximal size of possible extension queue 1386. Compared 336515 event pairs, 6571 based on Foata normal form. 528/37511 useless extension candidates. Maximal degree in co-relation 75157. Up to 8938 conditions per place. [2024-11-28 02:42:18,258 INFO L140 encePairwiseOnDemand]: 74/87 looper letters, 306 selfloop transitions, 63 changer transitions 0/393 dead transitions. [2024-11-28 02:42:18,259 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 393 transitions, 2849 flow [2024-11-28 02:42:18,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-11-28 02:42:18,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2024-11-28 02:42:18,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 1630 transitions. [2024-11-28 02:42:18,262 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6460562822037257 [2024-11-28 02:42:18,262 INFO L175 Difference]: Start difference. First operand has 121 places, 101 transitions, 647 flow. Second operand 29 states and 1630 transitions. [2024-11-28 02:42:18,262 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 393 transitions, 2849 flow [2024-11-28 02:42:18,352 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 393 transitions, 2713 flow, removed 14 selfloop flow, removed 5 redundant places. [2024-11-28 02:42:18,355 INFO L231 Difference]: Finished difference. Result has 153 places, 146 transitions, 1144 flow [2024-11-28 02:42:18,355 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=595, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=1144, PETRI_PLACES=153, PETRI_TRANSITIONS=146} [2024-11-28 02:42:18,355 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, 69 predicate places. [2024-11-28 02:42:18,355 INFO L471 AbstractCegarLoop]: Abstraction has has 153 places, 146 transitions, 1144 flow [2024-11-28 02:42:18,356 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 48.125) internal successors, (770), 16 states have internal predecessors, (770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:42:18,356 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 02:42:18,356 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:42:18,364 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bbc2480-f651-4e25-abd7-0db36f997a06/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-11-28 02:42:18,560 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bbc2480-f651-4e25-abd7-0db36f997a06/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:42:18,560 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-28 02:42:18,560 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:42:18,561 INFO L85 PathProgramCache]: Analyzing trace with hash 446538172, now seen corresponding path program 1 times [2024-11-28 02:42:18,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:42:18,561 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1190428244] [2024-11-28 02:42:18,561 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:42:18,561 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:42:18,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:42:18,971 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 02:42:18,971 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:42:18,971 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1190428244] [2024-11-28 02:42:18,971 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1190428244] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:42:18,971 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [55569137] [2024-11-28 02:42:18,972 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:42:18,972 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:42:18,972 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bbc2480-f651-4e25-abd7-0db36f997a06/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:42:18,974 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bbc2480-f651-4e25-abd7-0db36f997a06/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:42:18,977 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bbc2480-f651-4e25-abd7-0db36f997a06/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-28 02:42:19,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:42:19,078 INFO L256 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-11-28 02:42:19,080 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:42:19,089 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-28 02:42:19,173 INFO L349 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2024-11-28 02:42:19,173 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 16 [2024-11-28 02:42:19,178 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-11-28 02:42:19,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-28 02:42:19,215 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-11-28 02:42:19,226 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-28 02:42:19,226 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-28 02:42:19,278 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-28 02:42:19,278 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:42:19,507 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 162 treesize of output 156 [2024-11-28 02:42:19,698 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-28 02:42:19,698 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [55569137] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:42:19,698 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:42:19,699 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 13 [2024-11-28 02:42:19,699 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260873371] [2024-11-28 02:42:19,699 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:42:19,699 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-28 02:42:19,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:42:19,700 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-28 02:42:19,700 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2024-11-28 02:42:24,901 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 33 out of 87 [2024-11-28 02:42:24,902 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 146 transitions, 1144 flow. Second operand has 15 states, 15 states have (on average 34.93333333333333) internal successors, (524), 15 states have internal predecessors, (524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:42:24,902 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 02:42:24,902 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 33 of 87 [2024-11-28 02:42:24,902 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 02:42:35,239 INFO L124 PetriNetUnfolderBase]: 58659/95986 cut-off events. [2024-11-28 02:42:35,239 INFO L125 PetriNetUnfolderBase]: For 142427/145581 co-relation queries the response was YES. [2024-11-28 02:42:35,591 INFO L83 FinitePrefix]: Finished finitePrefix Result has 236442 conditions, 95986 events. 58659/95986 cut-off events. For 142427/145581 co-relation queries the response was YES. Maximal size of possible extension queue 3053. Compared 857822 event pairs, 18440 based on Foata normal form. 0/87996 useless extension candidates. Maximal degree in co-relation 229642. Up to 30739 conditions per place. [2024-11-28 02:42:35,842 INFO L140 encePairwiseOnDemand]: 75/87 looper letters, 194 selfloop transitions, 41 changer transitions 0/253 dead transitions. [2024-11-28 02:42:35,842 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 253 transitions, 2221 flow [2024-11-28 02:42:35,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-28 02:42:35,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-28 02:42:35,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 432 transitions. [2024-11-28 02:42:35,844 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5517241379310345 [2024-11-28 02:42:35,844 INFO L175 Difference]: Start difference. First operand has 153 places, 146 transitions, 1144 flow. Second operand 9 states and 432 transitions. [2024-11-28 02:42:35,844 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 253 transitions, 2221 flow [2024-11-28 02:42:36,099 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 253 transitions, 2200 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-28 02:42:36,101 INFO L231 Difference]: Finished difference. Result has 159 places, 147 transitions, 1228 flow [2024-11-28 02:42:36,101 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=1121, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=145, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1228, PETRI_PLACES=159, PETRI_TRANSITIONS=147} [2024-11-28 02:42:36,102 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, 75 predicate places. [2024-11-28 02:42:36,102 INFO L471 AbstractCegarLoop]: Abstraction has has 159 places, 147 transitions, 1228 flow [2024-11-28 02:42:36,102 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 34.93333333333333) internal successors, (524), 15 states have internal predecessors, (524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:42:36,102 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 02:42:36,102 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:42:36,109 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bbc2480-f651-4e25-abd7-0db36f997a06/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-11-28 02:42:36,302 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bbc2480-f651-4e25-abd7-0db36f997a06/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:42:36,303 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting thread3Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-28 02:42:36,303 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:42:36,303 INFO L85 PathProgramCache]: Analyzing trace with hash 957782311, now seen corresponding path program 1 times [2024-11-28 02:42:36,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:42:36,303 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [754719279] [2024-11-28 02:42:36,303 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:42:36,303 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:42:36,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:42:36,500 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 02:42:36,500 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:42:36,500 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [754719279] [2024-11-28 02:42:36,500 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [754719279] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:42:36,500 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1848422214] [2024-11-28 02:42:36,500 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:42:36,500 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:42:36,501 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bbc2480-f651-4e25-abd7-0db36f997a06/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:42:36,503 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bbc2480-f651-4e25-abd7-0db36f997a06/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:42:36,506 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bbc2480-f651-4e25-abd7-0db36f997a06/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-28 02:42:36,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:42:36,609 INFO L256 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-28 02:42:36,612 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:42:36,862 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 02:42:36,863 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:42:36,927 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2024-11-28 02:42:36,939 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 02:42:36,939 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1848422214] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:42:36,939 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:42:36,939 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2024-11-28 02:42:36,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761637414] [2024-11-28 02:42:36,939 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:42:36,940 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-28 02:42:36,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:42:36,940 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-28 02:42:36,940 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-11-28 02:42:37,476 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 87 [2024-11-28 02:42:37,477 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 147 transitions, 1228 flow. Second operand has 11 states, 11 states have (on average 46.54545454545455) internal successors, (512), 11 states have internal predecessors, (512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:42:37,477 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 02:42:37,477 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 87 [2024-11-28 02:42:37,477 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 02:42:45,128 INFO L124 PetriNetUnfolderBase]: 43249/69852 cut-off events. [2024-11-28 02:42:45,128 INFO L125 PetriNetUnfolderBase]: For 140527/146845 co-relation queries the response was YES. [2024-11-28 02:42:45,384 INFO L83 FinitePrefix]: Finished finitePrefix Result has 186063 conditions, 69852 events. 43249/69852 cut-off events. For 140527/146845 co-relation queries the response was YES. Maximal size of possible extension queue 2398. Compared 594657 event pairs, 16252 based on Foata normal form. 0/67470 useless extension candidates. Maximal degree in co-relation 179536. Up to 20794 conditions per place. [2024-11-28 02:42:45,560 INFO L140 encePairwiseOnDemand]: 75/87 looper letters, 180 selfloop transitions, 41 changer transitions 0/243 dead transitions. [2024-11-28 02:42:45,560 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 243 transitions, 2300 flow [2024-11-28 02:42:45,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-28 02:42:45,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-28 02:42:45,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 423 transitions. [2024-11-28 02:42:45,561 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6945812807881774 [2024-11-28 02:42:45,561 INFO L175 Difference]: Start difference. First operand has 159 places, 147 transitions, 1228 flow. Second operand 7 states and 423 transitions. [2024-11-28 02:42:45,561 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 243 transitions, 2300 flow [2024-11-28 02:42:45,729 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 243 transitions, 2222 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-11-28 02:42:45,732 INFO L231 Difference]: Finished difference. Result has 160 places, 147 transitions, 1251 flow [2024-11-28 02:42:45,733 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=1148, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1251, PETRI_PLACES=160, PETRI_TRANSITIONS=147} [2024-11-28 02:42:45,733 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, 76 predicate places. [2024-11-28 02:42:45,733 INFO L471 AbstractCegarLoop]: Abstraction has has 160 places, 147 transitions, 1251 flow [2024-11-28 02:42:45,733 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 46.54545454545455) internal successors, (512), 11 states have internal predecessors, (512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:42:45,733 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 02:42:45,734 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:42:45,739 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bbc2480-f651-4e25-abd7-0db36f997a06/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-28 02:42:45,934 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bbc2480-f651-4e25-abd7-0db36f997a06/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:42:45,934 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-28 02:42:45,934 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:42:45,934 INFO L85 PathProgramCache]: Analyzing trace with hash 1636249949, now seen corresponding path program 1 times [2024-11-28 02:42:45,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:42:45,935 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2099213062] [2024-11-28 02:42:45,935 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:42:45,935 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:42:45,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:42:46,040 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-28 02:42:46,040 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:42:46,040 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2099213062] [2024-11-28 02:42:46,040 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2099213062] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:42:46,040 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1743582838] [2024-11-28 02:42:46,041 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:42:46,041 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:42:46,041 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bbc2480-f651-4e25-abd7-0db36f997a06/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:42:46,043 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bbc2480-f651-4e25-abd7-0db36f997a06/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:42:46,045 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bbc2480-f651-4e25-abd7-0db36f997a06/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-28 02:42:46,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:42:46,153 INFO L256 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-28 02:42:46,154 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:42:46,257 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-28 02:42:46,257 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:42:46,356 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-28 02:42:46,357 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1743582838] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:42:46,357 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:42:46,357 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2024-11-28 02:42:46,357 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477093071] [2024-11-28 02:42:46,357 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:42:46,357 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-28 02:42:46,358 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:42:46,358 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-28 02:42:46,358 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2024-11-28 02:42:46,669 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 87 [2024-11-28 02:42:46,670 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 147 transitions, 1251 flow. Second operand has 16 states, 16 states have (on average 48.3125) internal successors, (773), 16 states have internal predecessors, (773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:42:46,670 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 02:42:46,671 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 87 [2024-11-28 02:42:46,671 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 02:42:58,056 INFO L124 PetriNetUnfolderBase]: 61214/100274 cut-off events. [2024-11-28 02:42:58,056 INFO L125 PetriNetUnfolderBase]: For 237113/249052 co-relation queries the response was YES. [2024-11-28 02:42:58,492 INFO L83 FinitePrefix]: Finished finitePrefix Result has 278294 conditions, 100274 events. 61214/100274 cut-off events. For 237113/249052 co-relation queries the response was YES. Maximal size of possible extension queue 3477. Compared 915209 event pairs, 20242 based on Foata normal form. 1499/98571 useless extension candidates. Maximal degree in co-relation 263205. Up to 26326 conditions per place.